Origin of shape anisotropy effects in solution-phase synthesized FePt nanomagnets
- Microelectronics Research Center, University of Texas at Austin, Austin, Texas 78758 (United States)
- Intel Corporation, Hillsboro, Oregon, 97124 (United States)
- Astrowatt Inc, Austin, Texas, 78758 (United States)
- Electrical Engineering Department, Indian Institute of Technology, Bombay 400076 (India)
- Department of Physics, University of Texas at Austin, Austin, Texas 78712 (United States)
Controlling the morphology of inorganic nanocrystals is important because many of their electronic attributes are highly sensitive to shape and aspect ratio. FePt nanocrystals have potential as advanced magnetic materials for ultrahigh-density memory. This is due to their high shape and/or magnetocrystalline anisotropy, which allows bits as small as 3 nm to be thermally stable over typical data storage periods of 10 years. Herein, nanocrystals were simply fabricated by simultaneous reduction of platinum acetylacetonate and thermal decomposition of iron pentacarbonyl in properly chosen conditions of solvent/surfactant proportions and temperature for rational design of their shape and magnetic properties. This work has combined magnetometry measurements and micromagnetic simulations to illustrate the role of the external shape on the rotation of the magnetization vector for colloidal assemblies.
- OSTI ID:
- 22038639
- Journal Information:
- Journal of Applied Physics, Vol. 110, Issue 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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